Features: The water quality detectors can simultaneously detect six indicators: TDS, CODTOC, UV275, EC, and TEMP. The water quality detectors has intelligent scoring function, representing four different level of water quality. By using the backlights color to represent four grade of water quality: excellent, good, average, and poor, the results are intuitives. The water quality detectors probes is dustproof and waterproof, not easily damaged, and meets the waterproof grade of IP67. The water quality detectors has environmental temperature compensation function, ensuring numerical stability and allowing for long-term calibration. Colorful large screen display for more convenient readings. Pen style design, small and portable. Sensitive probes for accurate measurement. Specifications: Material:ABS Powered by:2Pcs AAABattery(not included) Size:Approx.157mm/6.18'x37mm/1.45x14mm/0.55' Note: Please allow 1mmerrors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Water Quality Tester